[AT] unleaded gasoline

[Ronald L. Cook]

Thanks, Gene.
	That is pretty much what I had been thinking.  I was just wanting some 
opinions to hand to by brother.  He had been buying gasoline from a 
local supplier that delivered a lead substitute in the gasoline for 
regular burners.  That supplier sold out and the new owners will no 
longer supply the fuel with the additive premixed.  Personally, I always 
thought that supplier was just pulling the wool over and his customers 
were probably only paying for some red dye.

Ron Cook
Salix, IA

Gene Dotson wrote:
>     Ron;
>     All tractor and automotive engines built since 1972 are
> designed to run on unleaded fuel. They will likely run longer
> because of the lack of contaminants from the lead additive in
> the fuel. The primary need for lead in the older fuels it to
> bring the octane level high enough to prevent detonation in
> higher compression engines. Modern fuel are formulated to meet
> this octane requirement by other means. The primary concern to
> using unleaded fuels in older engines was erosion and wear to
> valves and valve seats. Most engines by this time that are in
> regular use have had the valve seats and valves replaced by
> special alloy parts, such as Stellite, that resists the heat and
> wear.
>     For your tractors I would just add fuel and not give it a
> second thought.. John Deere has used the Stellite parts since
> the mid 50's.
> 
>                     Gene
> 
> 
> 
> 
> 
> ----- Original Message -----
> From: "Ronald L. Cook" <rlcook at pionet.net>
> To: "Antique tractor email discussion group"
> <at at lists.antique-tractor.com>
> Sent: Friday, December 02, 2005 11:21 AM
> Subject: [AT] unleaded gasoline
> 
> 
> : Opinions please.  2510, 3010, and 4020 John Deere gas
> tractors.  Working
> : tractors, not parade tractors.  Are they going to hold up on
> unleaded
> : gasoline or do they need some lead from time to time?
> :
> : Ron Cook
> : Salix, IA
> :